Continuous stirrup for concrete construction work



' July 5, 1938. A RD 2,122,985

CONTINUOUS STIRRUP FOR CONCRETE CONSTRUCTION WORK Filed June 10, 1937Patented July 5, 1938 PATENT OFFICE CONTINUOUS STIRRUP FOR CONCRETECONSTRUCTION WORK Chester A. Lord, Chicago, Ill., assignor to UniversalForm Clamp 00., Chicago, 111., a corporation of Illinois ApplicationJune 10, 1937, Serial No. 147,427

Claims.

The main objects of this invention are to provide an improved form ofcontinuous stirrup for reinforcing concrete girders, beams and joists;to provide a continuous stirrup having improved 5 spacing and supportingmeans for supporting it in the usual temporary form or mold and forspacing it the required distance from the soflit of the form; to provideimproved spacing and supporting means for continuous stirrups which willalso serve to brace the stirrups and prevent distortion thereof duringpouring of the concrete; and to provide an improved continuous stirrupof this kind which is sturdy and simple in construction and which may beeasily and accurately placed in the mold even by unskilled labor.

An illustrative embodiment of this invention is shown in theaccompanying drawing, wherein:

Figure 1 is a longitudinal fragmentary section of a beam mold, showingan improved continuous stirrup supported therein.

Figure 2 is an enlarged transverse section taken on the line 2-2 ofFigure 1.

Figure 3 is a perspective of the improved continuous stirrup.

Figure 4 is a detail in elevation of a modified form of leg.

In the form shown, the improved reinforcing unit is supported in atemporary form or mold comprising a soffit I, and side walls 2,supported on horizontal battens 3. The side walls 2 are reinforced withthe usual vertical battens 4 and are secured against spreading'bykickers 5.

The improved reinforcing unit or continuous stirrup comprises aplurality of transverse reinforcing bars in the form of substantially U-shaped stirrups 6 each of which consists of a base 1 and a pair of sidearms 8, the free ends of which are bent outwardly and downwardly toprovide the usual anchors 9.

These U-shaped stirrups 6 are secured together as a unit, insubstantially parallel spaced relation to one another, by longitudinalreinforcing bars l0 and II arranged in pairs at respectively oppositesides of the unit and spot welded or otherwise rigidly secured to theouter sides of the arms 8.

In order that the base portions 1 may be spaced the required distancefrom the sofiit of the form, the unit is provided with independentvertical 5 legs I2 which are spot Welded or otherwise rigidly secured tothe longitudinal reinforcing bars l0 and II. Any desired number of theselegs may be used. They are preferably located intermediate the U-shapedstirrups.

55 If desired the legs may be bent to provide feet only support the uniton and space it vertically 10 from the mold but they also brace itagainst distortion during handling and also during the pouring of theconcrete.

I claim:

1. A reinforcing structural unit adapted to be 15 supported on atemporary form in the construction of concrete beams, comprising aplurality of stirrups disposed transversely of the unit and spacedlengthwise of the latter, vertically spaced longitudinal reinforcingbars secured to each side 20 of said stirrups for holding the latter inspaced relation, and independent legs located between said stirrups andsecured to said reinforcing bars for supporting the unit on the form.

2. A reinforcing structural unit of the class described adapted to besupported on a temporary form in the construction of concrete beams,comprising a plurality of U-shaped stirrups disposed transversely of theunit and spaced lengthwise of the latter, a plurality of longitudinalreinforc- 30 ing bars secured to said stirrups on each side of thelatter for holding said stirrups in spaced relation, and independentlegs located between said stirrups and secured to and crosswise of thereinforcing bars on each side of said stirrups for 35 supporting theunit on the form.

3. A reinforcing structural unit of the class described, adapted to besupported on a temporary form in the construction of concrete beams,comprising a plurality of parallel U-shaped stir- 40 rups disposedtransversely of the unit and spaced lengthwise of the latter, upper andlower horizontal reinforcing bars secured to said stirrups on each sideof the latter for holding said stirrups parallel and in spaced relation,and independent 45 vertical legs located between said stirrups andsecured to and crosswise of the outer sides of said reinforcing bars oneach side of said stirrups for supporting the unit on the form.

4. A reinforcing structural unit adapted to be supported on a temporaryform in the construction of concrete beams, comprising a plurality ofparallel U-shaped stirrups disposed transversely of the unit and spacedlengthwise of the latter,

a plurality of vertically spaced longitudinal reinforcing bars securedto said stirrups on each side of the latter for holding said stirrups inparallel and spaced relation, and independent individual legsrespectively disposed substantially midway between adjacent stirrups andsecured to and crosswise of said reinforcing bars on each side of saidstirrups. v

5. A reinforcing structural unit adapted to be supported on a temporaryform in the construction of concrete beams, comprising a plurality ofparallel U-shaped stirrups disposed transversely of the unit and spacedlengthwise of the latter,

